Nortel 222 User Manual

Also see for 222: Overview Quick install guide Fundamentals Release note

Contents

Nortel 222 User Manual Manual pdf 338 page image

338 Appendix M SIPNN47922-501SIP Service DomainThe SIP service domain of the VoIP service provider is the domain name in a SIPURI. For example, if the SIP address is 1122334455@VoIP-provider.com, thenVoIP-provider.com is the SIP service domain.SIP Call ProgressionTable 97 displays the basic steps in the setup and tear down of a SIP call. A callsB.1 A sends a SIP INVITE request to B. This message is an invitation for B toparticipate in a SIP telephone call.2 B sends a response indicating that the telephone is ringing.3 B sends an OK response after the call is answered.4 A then sends an ACK message to acknowledge that B has answered the call.5 Now A and B exchange voice media (talk).6 After talking, A hangs up and sends a BYE request.7 B replies with an OK response confirming receipt of the BYE request and thecall is terminated.Table 97 SIP Call ProgressionA B1. INVITE2. Ringing3. OK4. ACK5.Dialogue (voice traffic)6. BYE7. OK